To call Robert Grim progressive was like calling Auschwitz a Boy Scout camp, but Colton Mathers’s conservatism had fallen to an altogether different, amphibian low, as if it had been scorned by evolution itself after crawling out of the primordial swamp and, out of pure misery, had turned around and crept right back in. Mathers’s excuse was God; but then the Crusades were God’s work, too, Grim reasoned.